(19)

(11)

EP 2 092 159 A2

(12)

(88) Date of publication A3: 22.01.2009 (43) Date of publication: 26.08.2009 Bulletin 2009/35 (21) Application number: 07874297.0 (22) Date of filing: 19.11.2007

(51) International Patent Classification (IPC):  E21B 43/00(2006.01) (86) International application number: PCT/US2007/085088 (87) International publication number: WO 2008/133732 (06.11.2008 Gazette 2008/45)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR (30) Priority: 22.11.2006 US 603659 (71) Applicant: Strategic Resource Optimization, INC. 289 Elk Creek Drive Bailey, CO 80421 (US)	(72) Inventors: PETERS, Michael J. Bailey, CO 80421 (US) FAULDER, David D. Littleton, CO 80120 (US) (74) Representative: Bibby, William Mark  MATHISEN, MACARA & CO. The Coach House 6-8 Swakeleys Road Ickenham Uxbridge, Middlesex UB10 8BZ Uxbridge, Middlesex UB10 8BZ (GB)